Many Twitter users have since expressed their disgust with the ARU's stern words and sent messages of support for the rugby union star.

Ms Pocock would not be drawn on her feelings about the ARU warning, but said her partner worked hard to strike a balance between "wanting to do things that he feels really passionate about and not make things more difficult for his teammates".

"He's busy trying to focus now on getting back into the pre-season and doing that sort of thing, and was glad to have been able to publish a statement last night explaining why he chose to get involved," she said.

Ms Pocock said they had both been encouraged by supportive messages from the public since their exploits at the mine.

"I think that's one thing that's really been affirming through this, is seeing how many people really do actually support action on this, and who are opposed to the Maules Creek Mine," she said.

"I think that should send a pretty strong signal, particularly to the ACT Government, about the public climate on these issues."

Ms Pocock and a number of other Canberrans arrested on the weekend held a second protest today outside the ACT Legislative Assembly, calling on the Government to divest itself of its financial interests in Whitehaven Coal and scrap other fossil fuel investments.

Pocock, who has resumed pre-season training for the ACT Brumbies this week, was not present.

Protest about asking ACT Government to take 'next step'

The Maules Creek mine near Narrabri has been the target of protests for months, after land clearing recently resumed at the site operated by Whitehaven Coal.

The former Wallabies captain and a number of others were charged with trespass, remaining on enclosed land without lawful excuse and hindering the working of mining equipment. He was also found to have breached the ARU's code of conduct.

Ms Pocock said the protest was peaceful, with respect maintained between activists and police.

"The virtue of it being a non-violent, direct action is that everything was pretty calm," Ms Pocock said.

"There would be plenty of mine sites in the world that you'd go onto and probably end up dead. So there's something to be said for living in a reasonably well-functioning democracy."

The activist said today's peaceful protest was about asking the ACT Government to take the next step in their commitment to a renewable energy future.

"The thing that I would stress is that we're really proud of the ACT Government and their commitment to things like renewables ... we're just really trying to encourage them to carry that forward, and not rest on their laurels and allow these sort of investments to stand."